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Summary of Proposal LAN2851

TitleAssessment and Prediction of Land Surface Subsidence due to Underground Metal Mining in Hard Rock using integrated microwave remote sensing and geodetic techniques in Khetri Copper Complex.
Investigator ALAM, MOHAMMAD SOYEB - INDIAN SCHOOL OF MINES, DHANBAD, MINING ENGINEERING DEPARTMENT
Team Member
SCIENTIST CHATTERJEE, R S - INDIAN INSTITUTE OF REMOTE SENSING, ISRO, GEOSCINCES & DISATER MANAGEMENT STUDIES
Dr. Kumar, Dheeraj - INDIAN SCHOOL OF MINES, DHANBAD, MINING ENGINEERING DEPARTMENT
SummaryObjectives of the project: •Detection of land surfacedeformation due to underground metal mining, using Microwave Remote sensing SLC DataSets. •Assessment of surfacesubsidence in mining area using Differential Interferometric Synthetic ApertureRadar (D-InSAR) Technique. •Quantitative Validationof spatial result with ground based techniques (using Leveling/TS/DGPS Instruments) ••Development of asurface subsidence prediction model for underground metal mining. DD b. Detailed methodology: In this study,it is required to assess and monitor subsidence by DInSAR technique. In DInSARtechnique, two SAR images acquired from two slightly different positions, atdifferent times, are used to observe the geographic information via measuringthe phase difference to form the interferogram between the two acquisitions.The phase difference between different SAR images pairs yields the amount oftemporal deformation (i.e. subsidence) in that period. The entirework is divided into seven (7) tasks Task 1: Literature review, Data collections and Fieldobservations: Extensiveliterature survey will be conducted to obtain the up to date information aboutresearch activities in the proposed related work in India. Task 2:Processing of SAR data As this wouldbe the major component of research work as the development of DinSAR would becompletely based the processing of SAR data. Task 3:Interferometric processing §Interferogram Generation and Flattening §Adaptive Filtering and Coherence Map generation §Phase Unwrapping §Orbital Refinement §Phase to Height or Displacement Conversion andGeocoding Amaster (M) and a slave acquisition(S) are over sampled and co-registered. Theinterferogram is computed from the complex multiplication of the master imageand the re-sampled slave image. In the last stage, the reference phase of theellipsoid is subtracted Task4: Quantitative Validation of spatial result with ground based techniques (using Leveling/TS/DGPS Instruments)) Task5: Development of a surface subsidenceprediction model for underground Metal Mining in hard rock: Task6: Visit to the mines area for observing ground subsidence and other relatedthings. Severalvisits will be conducted to observe and record ground surface settlement usingintegration of conventional techniques such as Leveling/TS Instruments, Task7: Publication of the result c. Data Requirements: SLC data sets are required to understand the land deformation phenomena and its rate. d. Deliverables: Asof now ground based observations using leveling/ TS instrument is proven technique for land surface deformation observation/monitoring caused by the underground mining/extraction of oil and gas extraction. After completion of the project, if good relationshipestablishedbetween these two techniques, space borne observation technique formonitoringof land surface deformation due tounderground mining/extraction of oil and gas extractionwill also be given equalweightage.

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